The Mosquitoes of Canada 85 



PsoROPHORA (Janthinosoma) sayi Dyar & Knab. 



Culex musicus Say (not L,each), Journ. Acad. Nat. Sci. Phil., vi, 149, 1827. 

 Culex posticatus Coquillett (not Wiedemann), U.S. Dept. Agr., Div. Ent., 



Circl. 40, 2 Ser., 6, 1900. 

 Janthinosoma discrucians Giles (not Walker), Gnats or Mosq., 2 ed. 339 



1902. 

 lanthosoma mexicanum Blanchard (not Bellardi), Les Moust., 234, 1905. 

 Janthinosoma sayi Dyar & Knab, Journ. N.Y. Ent. Soc, xtv, 181, 1906. 

 Janthinosoma sayi Theobald, Mon. Culic, iv, 155, 1907. 



A large brown mosquito, the hind legs shortly shaggy and tipped 

 with white. Palpi, legs and abdiOmen black with blue reflection. Head 

 with dense erect golden scales; mesonotum with sparse golden scales; 

 abdomen blue-black doraslly, with lateral triangular apical segmental 

 yellow patches, confluent with the golden yellow venter; legs blue- 

 black, the vestiture of the hind pair shortly erect, tip of third tarsal and 

 all of the fourth and fifth white. Wings slightly smoky, the scales 

 narrow, all da.rk. 



The larvae live in temporary rain-puddles, and develop rapidly. 

 The period of larval life is very short. The winter is passed in the egg 

 state, the eggs being spinose and adapted to withstand dessication. 

 The adult is generally rare, but conspicuous when seen. It will bite in day 

 time in the open, but is never numerous enough to be troublesome. 



Distribution: Atlantic aad Gulf States to southern Ontario, Cuba 

 and Bahamas. 



Canadian Records. 

 Jordan, Ontario, August 3, 1916 (E. Hearle). 



Genus Aedes Meigen, 



A large genus of world-wide distribution. Species of this genus are 

 especially abundant in northern and arctic regions. The winter is passed 

 in the egg state, and development takes place in ground pools filled by 

 snow-water. The adults are all severe biters, and often occur in enormous 

 numbers. They are killed by the first hard frosts. 



The genus has been divided into a number of subgenera on the charac- 

 ters of the male genitalia. The groups occurring in Canada may be 

 separated as follows: 

 I. Harpagones present, strap- shaped organs with terminal fila- 

 ment 2 



Harpagones absent 3 



